When serial="%UUID%" is set in the config file, ftdi_eeprom generates
a random UUID v4 at flash time and uses it as the device serial number.
This provides unique-per-device identification without manual tracking.
$ cat device.conf
serial="%UUID%"
use_serial=true
$ ftdi_eeprom --flash-eeprom device.conf
Generated UUID serial: A3F7B21C-E8F4-404D-86FA-07870EED3582
Uses libuuid (optional dependency, auto-detected by cmake). When libuuid
is not available, using %UUID% prints a clear error and exits.
---
ftdi_eeprom/CMakeLists.txt | 15 +++++++++++++++
ftdi_eeprom/example.conf | 3 ++-
ftdi_eeprom/main.c | 23 ++++++++++++++++++++++-
3 files changed, 39 insertions(+), 2 deletions(-)
diff --git a/ftdi_eeprom/CMakeLists.txt b/ftdi_eeprom/CMakeLists.txt
index 38147b5..30c9f3f 100644
--- a/ftdi_eeprom/CMakeLists.txt
+++ b/ftdi_eeprom/CMakeLists.txt
@@ -1,6 +1,12 @@
find_package(Confuse REQUIRED)
find_package(Libintl)
+find_path(UUID_INCLUDE_DIR uuid/uuid.h)
+find_library(UUID_LIBRARY NAMES uuid)
+if (UUID_INCLUDE_DIR AND UUID_LIBRARY)
+ set(UUID_FOUND TRUE)
+endif ()
+
# determine docdir
include(GNUInstallDirs)
if (NOT CMAKE_INSTALL_DOCDIR)
@@ -16,6 +22,12 @@ message(STATUS "Building ftdi_eeprom")
include_directories(${CONFUSE_INCLUDE_DIRS})
list(APPEND libs ${CONFUSE_LIBRARIES})
+if (UUID_FOUND)
+ include_directories(${UUID_INCLUDE_DIR})
+ list(APPEND libs ${UUID_LIBRARY})
+ add_definitions(-DHAVE_UUID)
+endif ()
+
if (LIBINTL_FOUND)
include_directories(${LIBINTL_INCLUDE_DIR})
list(APPEND libs ${LIBINTL_LIBRARIES})
@@ -45,6 +57,9 @@ target_link_libraries(ftdi_eeprom ${CONFUSE_LIBRARIES})
if (LIBINTL_FOUND)
target_link_libraries(ftdi_eeprom ${LIBINTL_LIBRARIES})
endif ()
+if (UUID_FOUND)
+ target_link_libraries(ftdi_eeprom ${UUID_LIBRARY})
+endif ()
if (NOT SHAREDLIBS AND STATICLIBS)
target_link_libraries(ftdi_eeprom ${LIBUSB_LIBRARIES})
endif ()
diff --git a/ftdi_eeprom/example.conf b/ftdi_eeprom/example.conf
index 545703e..a397dd1 100644
--- a/ftdi_eeprom/example.conf
+++ b/ftdi_eeprom/example.conf
@@ -24,7 +24,8 @@ product_id="0x6001"
# Integer: Product ID. FT245R factory default 0x
##############################
manufacturer="ACME Inc"
# String: Manufacturer. FT245R factory default FTDI
product="USB Serial Converter"
# String: Product. FT245R factory default FT245R USB FIFO
-serial="08-15"
# String: Serial"number". FT245R factory default (sample chip)
A9082P2B
+serial="08-15"
# String: Serial number. FT245R factory default (sample chip)
A9082P2B
+
# Use "%UUID%" to auto-generate a UUID v4 at flash time
(requires libuuid)
use_serial=true
# Boolean: Use the serial number string
############
diff --git a/ftdi_eeprom/main.c b/ftdi_eeprom/main.c
index 566d9e6..20ec4b2 100644
--- a/ftdi_eeprom/main.c
+++ b/ftdi_eeprom/main.c
@@ -38,6 +38,9 @@
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
+#ifdef HAVE_UUID
+#include <uuid/uuid.h>
+#endif
#include <confuse.h>
#include <libusb.h>
@@ -454,9 +457,27 @@ int main(int argc, char *argv[])
}
}
}
+ const char *cfg_serial = cfg_getstr(cfg, "serial");
+ char uuid_serial[37]; /* "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\0" */
+
+ if (strcmp(cfg_serial, "%UUID%") == 0)
+ {
+#ifdef HAVE_UUID
+ uuid_t uuid;
+
+ uuid_generate(uuid);
+ uuid_unparse_upper(uuid, uuid_serial);
+ cfg_serial = uuid_serial;
+ printf("Generated UUID serial: %s\n", cfg_serial);
+#else
+ fprintf(stderr, "Error: serial=%%UUID%% requires libuuid support (not
compiled in)\n");
+ exit(-1);
+#endif
+ }
+
ftdi_eeprom_initdefaults (ftdi, cfg_getstr(cfg, "manufacturer"),
cfg_getstr(cfg, "product"),
- cfg_getstr(cfg, "serial"));
+ cfg_serial);
printf("FTDI read eeprom: %d\n", ftdi_read_eeprom(ftdi));
eeprom_get_value(ftdi, CHIP_SIZE, &my_eeprom_size);
--
2.51.0
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
|
